feat: new integration tests for robot, making sure to get 100% code coverage

ref: N25B-256

src/control_backend/api/v1/endpoints/robot.py

@@ -41,7 +41,6 @@ async def ping_stream(request: Request):
         # Set up internal socket to receive ping updates
         logger.debug("Ping stream router event stream entered.")
 
-        # TODO: Check with Kasper
         sub_socket = Context.instance().socket(zmq.SUB)
         sub_socket.connect(settings.zmq_settings.internal_sub_address)
         sub_socket.setsockopt(zmq.SUBSCRIBE, b"ping")